I found this to be interesting. That’s probably because of my Cultural Anthropology background.

Source: https://matcha-jp.com/en/753
Although it is not a national holiday, March 3rd is a special day for girls. Families who don’t have young daughters might not do anything special on this day.
March 3rd is Japanese Girls’ Day or Hinamatsuri. Ornate dolls are displayed in the family home to mark the beginning of spring and to wish good health and good fortune for all of the girls in the family.
However, a tradition of this festival is still passed down until now. Actually, how people celebrate Hina Matsuri is different from place to place. We will introduce here what the Japanese people usually do on this day.
Hina Dolls represent what the imperial family was like in the ancient times. The dolls on the top tire of the platforms represent the emperor and the empress. The rest of the dolls are three court ladies, five musicians and the minister of the Right and Left who used to support the government in the old days. There are some decorations such as Gissha (oxcarts), small cupboards, Japanese paper lamps called “Bonbori”, and orange and peach tree branches displayed on the tire of platforms.
The facial expressions and costumes of each doll are also different depending on their personality and position.
The special meals for Hina Matsuri are Amazake (sweet drink), Chirashizushi (a style of sushi) and Hina Arare (sweet colorful rice crackers).
Amazake is a traditional Japanese sweet and thick drink made from fermented glutinous rice. Amazake literally means “sweet alcohol” but it has less than 1 percent of Shirozake alcohol in it. So children are also able to drink it.

Drinking Shirozake, which is a traditional sweet sake, was one of the customs to get rid of bad things out from your body. But Shirozake is an alcoholic drink, so Amazake was made with the children in mind.
Hina Arare are colorful and cute small rice crackers. The colors of these rice crackers have meanings. White represents the earth of the winter, pink and red represent life, while green represents the green shoots in the spring. Hina Arare is a snack showing our expectations toward the arrival of spring after the long cold winter. People also say that you will live healthy for this coming year if you eat each color of Hina Arare.
Chirashizushi is a type of Sushi which has lotus roots, shrimp and thinly shredded egg omelet on the top of vinegar rice. It has been a dish enjoyed widely at celebrations.
The ingredients in Chirashizushi have meanings as well. The lotus root is said to give one the power to see what will happen in the future, shrimps are a symbol of longevity and so on.

Source: https://www.thespruceeats.com/japanese-girls-day-hinamatsuri-party-dishes-2031057
As with almost all holidays, food and drink play a role on Girls’ Day, with rice wine and rice cakes taking center stage, along with flower blossoms. Hinamatsuri is also called Momo no Sekku, which means a festival of peach blossoms. Peach blossoms, shiro-zake (white fermented rice wine) and hishi-mochi (diamond-shaped rice cakes) are placed on the stand with the hina dolls. Hishi-mochi are colored pink representing peach flowers, white representing snow, and green representing new growth.
Traditionally, girls in Japan invited their friends to a home party to celebrate this festival. Many people prepare a special meal for girls on this day, including savory dishes such as chirashi, which is sugar-flavored, vinegared sushi rice with raw fish on top; clam soup served in the shell; and edamame maze-gohan, mixed rice usually consisting of brown rice and soybeans.
Other popular dishes to serve at a Girl’s Day celebration are inari sushi—rice-stuffed tofu pockets—with miso grilled salmon and cabbage ramen salad. Sweets are on the menu as well, incorporating a feminine shade of pink, like chi chi dango, which are pink pillows of mochi (glutinous rice flour and coconut milk), a favorite among children, and sakura-mochi, a pink, sweet rice cake. Some families include an impressive edible centerpiece, such as the layered chirashi sushi cake.

Easy Seafood Chirashizushi: Use a shortcut of packaged sushi seasoning to quickly season steamed rice and add pre-cooked gomoku vegetables for this delectable dish. Add your favorite toppings of choice.
Edamame Maze-Gohan (Mixed Rice): Is easy to prepare, especially for large crowds. Steamed rice is mixed with furikake seasoning, bottled nametake (seasoned mushrooms), and shelled edamame for a delicious rice dish.
Inari Sushi: Preparing a dish for a large crowd doesn’t need to be complicated. Find out the secrets of making quick inari sushi with impressive results.
Cabbage Ramen Salad: This spin on the traditional Chinese chicken salad recipe uses crunchy dried ramen noodles, cabbage, and shredded chicken to create a zesty Japanese-fusion salad.
Slow Cooker Teriyaki Chicken Wings: Let your slow cooker do all the work to whip-up a batch of delicious teriyaki chicken wings with just a few ingredients, and use the free time to prepare a few other dishes.
Miso Grilled Salmon: Miso-grilled salmon can easily be prepared by making the marinade ahead of time and then letting the salmon marinade for a few days in the fridge. All you need is an oven or a grill to cook up delicious fillets in under 40 minutes.
Clam Soup: A traditional soup that is often enjoyed on Hinamatsuri is clam soup. This clear style soup is known as sumashijiru and is simply seasoned from the broth of the clams.
Chi Chi Dango: These pillowy soft bites of mochi are made of glutinous rice flour and coconut milk. These pink, soft mochi are an absolute favorite among children.
Sakura Mochi: Sakura mochi is a glutinous rice dish that is often enjoyed during Hinamatsuri. This slightly sweetened, pink mochi is filled with sweet red beans (koshian) and wrapped in a salted sakura (young cherry blossom) leaf.